Phenolic foam materials and method of making same

Details Phenolic foam materials and method of making same Phenolic foam materials and method of making same

1979-04-03

1980-05-13

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521125, 521181, C08J 914

Patent

active

042029457

ABSTRACT:
A phenolic material having improved cell structure and surface skin characteristics is prepared by mixing, foaming and curing a foamable composition comprising a phenol-formaldehyde resin; an acid catalyst; a foaming agent-mixture containing a low boiling fluorocarbon, a surface active agent and a polyhydric alcohol; and a filler/extender mixture functioning as a cell structure control agent comprised of a water soluble inorganic salt and ammonium lignin sulfonate.

REFERENCES:
patent: Re24213 (1956-09-01), Blaricom et al.
patent: 2926722 (1960-03-01), Lauring
patent: 3313745 (1967-04-01), Klug
patent: 3740355 (1973-06-01), Klug

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